Dumping unit for motor trucks



J. C. POTH DUMPING UNIT FOR MOTOR TRUCKS Dec. 27, 1927.

3 Sheets-Sheet 1 Filed Dec. 2. 1925 Dec. 27, 1927.

J. c. POTH DUMPING UNIT FOR MOTOR TRUCKS Filed Dec. 2. 1925 3 Sheets-Sheet 2 c). C Pa 19 attouw f (Lu- Dec. 27, 192?. 1,653,874

.3. Ca POTH DUMPING UNIT FOR MOTOR TRUCKS Filed Dec. 2, 1925 5 511881255119812 3 v a gnuenfoz J- C-LPOZVD- Patented Dec. 27, 1927.

UNITED STATES PPATENT' OFFICE.

JOHN C. POTH, OF GALION, OHIO, ASSIGNOR T0 PERFECTION STEEL BODY 00., 01? i GALION, OHIO, A CORPORATION OF OHIO.

DUMPLING UNIT FOR MOTOR TRUCKS.

Application filed December 2, 1925. Serial No. 72,745.

This invention relates to an improved dumping unit for motor trucks and seeks, among other objects, to provide a siinple and eflicient unit which may be readily ap plied to conventional trucks as now in common use. I

The invention seeks, as a further object, to provide a unit embodying a novel base frame for supporting the dumping body as well as the tilting mechanism for the body.

And the invention seeks, as a still further object, to provide a unit embodying a novel tilting mechanisn'n Other and incidental objects of the invention not specifically mentioned in the foregoing, will appear during the course of the following description.

In the accompanying drawings:

Figure 1 isan elevat on showing a conventional truck equipped with my improved unit.

Figure 2 is a plan view particularly showing the base frame and tilting mechanism.

Figure 3 is a sectional view on the line 3-3 of Figure 1, looking in the direction indicated by the arrows. I

Figure 4 is a'detail side elevation showing the lifting gear of the tilting mechanism.

Figure 5 is a sectional view on the line 5-5 of Figure 4, looking in the direction indicated by the arrows, and showing the mounting of the lifting arms of the lifting gear.

Referring now more particularly to the drawings, I have shown my improved dumping unit in connection with a conventional motor truck, the side bars of the chassis frame of which are indicated at 10. Mounted upon said side bars is the usual cab 11.

In accordance with the present invention,

I employ a base frame which, as shown in Figure 2, includes a pair of spaced parallel side bars 12, and extending transversely between the side bars, near the ends thereof, are parallel tie bars 13 welded or otherwise secured to the lower faces of the side bars. As brought out in Figure 3, the side bars 12 of the base frame are spaced apart to overlie the side bars 10 of the chassis frame in superposed relation and any approved means may be employed for rigidly connecting the base frame with the chassis frame. Fixed to the outer sides of the bars 12 at the ends of the rear-most tie bar 13 are up standing brackets 14, and normally lying in spaced parallel relation to the base frame is a dumping body 15 to which is fixed spaced brackets 16 mating with the brackets 14. Extending through said brackets is a cross rod 17 pivotally mounting thebody. snugly fitting between the forward ends'of the side bars 12 of the base frame is an inverted U-shaped rest 18 for the forward end of the body, the rest being of a height to sus tainthe body in horizontal position. As shown in Figure 3, the ends of the rest seat against the foremost of the tie bars 13 and said rest may be bolted to the side bars 12, as shown, or otherwise rigidly fixed thereto.

Extending transversely between the side bars 12 of the base frame at the forward end portion of said frame, are spaced pan allel cross bars 19 and extending longitudi--- nally of the base frame between said cross bars are spaced parallelangle rails 20 having-widened side flanges 21. The ,bars 19 are bolted or otherwise rigidly fixedto the side bars 12 and, likewise, the rails 20 are bolted or otherwise rigidly fixed to the barsv 19 so that these several bars will cooperate with each other andwith the side bars 12 and tie bars 13 to produce a rigid base frame.

Extending through the flanges 21 of the angle rails 20 are spaced parallel shafts 22 and 23. Rotatable on the shaft 22 is a compound gear element comprising a large gear 24 and a small gear 25 integral with the large gear, and meshing with the gear 25 is the large gear 26 of a compound gear element rotatably mounted 011 the shaft 23. The latter gear element includes a small gear 27 integral with the large gear 26, and meshing with the gear 27 is the large gear 28 of another compound gear element journaled on the shaft 22. This latter gear element includes a small gear 29 and meshing with said gear is a lifting gear 30 journaled on the shaft 23. Fitting over the ends of said shaft 23 as well as over the ends of the shaft 22 are sleeves 31 spacing the several gears with respect to the rails 20.

Fixed at their inner ends to the gear 30, as shown in Figures 4 and 5 of the drawings, is a pair of radial arms 32 lying flat against opposite sides of the gear and notched at their inner ends to fit the gear hub. The inner ends of the arms are welded to the gear, and reinforcing the welded connections be tween the arms and the gear are bolts or other suitable fastening devices 33, a partic ularly rigid and durable construction being thus provided. Atthe periphery of tliegear the arms are offset to extend in spaced parallel relation at their outer, ends and, as shown in Figure 1, said arms are normally disposed to incline downwardly and rearwardly with respect to the r base frame Fixed to the bottom of the" body 15 are spaced angle bars 34, and extending between the free ends of the arms 32 and said bars is a pair of links 35 pivotally conncctedwith the arms and said bars by pins 36; l t

Fixed to the outer side of the right hand side bar of the base frame, as seenin Figures 1 and 2 of the drawings, is an upstanding arm 37, and journaled through said arm and through the flanges 21 ofthe rails 20, is a shaft 38 which extends in front of the-rest 18. Fixed to the shaft to mesh with the gear 2st is a pinion 39 and fixedto thelouter end of the shaft is a ratchet 40 having avhub 41 which isprovided with a socket to receive a suitable crank, aslindicated at 42. Pivoted upon the arm to coact with the ratchet 40, as best seen in Figure 3, is a pawl d3.

As will now be seen in view O'f'flIB fore going, the crank 42 may be operated for turningthe shaft 38, when the train of lifting gears will be turned forrotating the gear 30 and swinging the arms 32 of the latter gear upwardly and tilting the body 15 to dump the load, and, ofcourse, the body may be locked in tilted position by means of the pawl 4a Furthermore, as shown in Figure 1, this pawl may beemployed for locking the body in load-carrying position but due to the normally downwardly inclined position of the arms32, the body will, under ordinary conditions, be maintained in engagement with the rest 18 without the assistaneeof the the necessity for structural change therein.

flaring thus described the invention, what I claim is:

In combination; with a frame including parallel side bars, tie bars, end and intermediate cross bars, and abody tiltably mounted upon the rear of the frame, an inverted U? shaped rest for the front of the body extending transversely beneaththe same and hav ing depending end portions secured against the forward end portions of the side bars, one of said tie bars extending between said side barsand engaging thelower endsof the end portions of said rest to sup )ortthe same, angle rails disposed longitud nally of the framewintermediate the side bars andconnectin i the end and intermediate eross bars, cross shafts mounted in the upright flanges ofthe ,rails, complemental; gear, elements looselyi mounted upon the cross shafts and including a lifting gear, an arm i extending rearwardly and downwardly from; thewlift- 1 ing gear, a: pitman connecting the arm with said body, an operating shaftmounted inthe said rails and extended atwone end beyond a side bar of the frame, a supporting arm :for the projecting end, of the operating shaft 'securedto the adjacent side bar of the frame,

JOHN G. POTH." [as] a 

